C64 Serial Port finished!
ard at p850ug1.demon.co.uk
Wed Sep 20 19:10:29 CDT 2006
> At 11:22 PM +0100 9/20/06, Tony Duell wrote:
> >Well done!. One comment, I would seriously recomend putting some kind of
> >strain-relief on the wires at the edge connector. What I normally do is
> >screw a couple of tapped spacers to the connector feed, then screw a bit
> >of small angle brass (L cross section) to the other side of those, and
> >then fit cable clips to that as appropriate. Otherwise you will go mad
> >continually resoldering thr wires. Don't ask how I found that out :-)
> I need to do something with all that, as I mentioned in one message,
> this is the one part of the construction I don't like. Right now the
> only way to unplug it is to use a pair of needle-nose pliers.
> My problem is a decided lack of hardware on hand. You don't even
I stocked up on M2, M2.5, M3 and M4 nuts and bolts (of various lengths).
That covers must homebrewing applications. If you prefer the UNC threads,
they'll do too :-). I wouldn't even think of ordering less than 100 of
each part, for the common stuff (like M3 nuts), I tend to buy 1000.
I am perhaps lucky in that I have a reasonable mechanical workshop too.
If I need a special spacer, I make it from brass rod. A lathe makes it
easy to get it to the right length, to drill and tap the centre hole,
etc. I know this is not an option for everyone, though.
> want to know what I had to do to come up with the hardware to fasten
> the 25-pin connector to the case!
The worse one is the HPIB (IEEE488) connector. The jackposts for that are
M3.5 thread. And nobody in the UK would sell me a couple. The end result
was that I bought a set of M3.5 taps and made them from stainless steel rod.
> >My first guess was some kind of tape cartidge box (the translucent
> >plastic and the way it opens gave it away). I see others have correctly
> >said it was a TK50-like box. Well, I viewed the pictures in an local
> >internet cafe, and the box looks rectuangular (as opposed to square).
> >Either something is distorting the picture (does it look square to anyone
> >else?) or you've hit the well known perspective problem that affects
> >everyone who takes close-ups without a technical camera.
> On my Mac and on my laptop (WinXP), they appear to be square. The
Oh, probaby a 'feature' of the LCD monitors in the internet cafe, then.
On those it looked to have about the same aspect ratio as an audio
compact cassette case.
> pictures were taken with a Nikon D70 and 105mm Macro lens, though I
> did a pretty poor job on the depth of field. Maybe I should try with
That's one advantage of a technical camera. If you get the flim plane,
the plane of the less (yes, that's an approximation for a real lens) and
the plane of the subject all passing through one point  you get sharp
focus throughout the image plane. I am not going to attempt to spell the
name of the guy who named this principle, though.
 That point may be at infinity, that is the 3 planes can be parallel,
which is the case for most 'normal' cameras.
> my "antique" Sony Mactiva <sp?>, it's the 10x Optical zoom one that
Oh my carmeras are such antiques that they don't even know what a floppy
> writes to a floppy. I bought it nearly 10 years ago, largely to be
> able to photograph computer equipment, and because it would work well
Odd. That's why I bought an MPP Monorail...
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